all woks fine in xtc e.g., synths with nice timing , effects
but only if i add more than 7 synths (i tried different synths every time same problem )
i got the message box with the error message
"No more driver memory for async vxd connections"

but i can load as many effects i want ... if dsp space is left

my question:
can other users load more syns in xtc mode ( in repaer or other daws and latest scope version)
is this a known problem or just my setup

i did all known win performance tweaks for scope '( descriped in this an other forums)
i did all bios tweaks for optimal sound performance

but i know the scope shares some interrupt with my other on board sound device... but it's not possible to
disable this (need this) one and i can not switch the ir because i cant switch the pci slot and no other ir left

From my understanding (correct me if Im wrong anyone because Im not 100% about this), some Scope plugins use ASYNC code and others do not, and its this ASYNC code that is bound/restricted by host communications down the bus.

So therefore you can hit the limit on ASYNC devices but still be able to add more other (non-ASYNC) devices to your project.